Journal of Orthopaedic Science最新文献

{"title":"Webplasty using an external fixator for complex syndactyly caused by Apert syndrome","authors":"Akira Kinoda ,&nbsp;Kazuki Sato ,&nbsp;Takuji Iwamoto ,&nbsp;Noboru Matsumura ,&nbsp;Taku Suzuki ,&nbsp;Yasuhiro Kiyota ,&nbsp;Takeshi Kimura ,&nbsp;Toshiyasu Nakamura","doi":"10.1016/j.jos.2024.04.007","DOIUrl":"10.1016/j.jos.2024.04.007","url":null,"abstract":"<div><h3>Background</h3><div>Webplasty can be conducted for complex syndactyly<span> caused by Apert syndrome<span> (also referred to as Apert hand) by extending the soft tissue in the lateral direction using an external fixator. This study aimed to verify the usefulness of webplasty without skin grafting.</span></span></div></div><div><h3>Methods</h3><div>Webplasty with lateral extension was conducted at a single institution from 2015 to 2023. The patients were four children with Apert hand aged 1–3 years. A custom-made small external fixator was used for all of the soft tissue extension.</div></div><div><h3>Results</h3><div>Webplasty without skin grafting was completed by the time all five patients were 5–6 years of age.</div></div><div><h3>Conclusion</h3><div>Webplasty without skin grafting was possible with lateral extension of the soft tissue using a simple external fixator.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 302-306"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141074525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Directly measured strain patterns of the anterior talofibular and calcaneofibular ligaments after isolated ATFL repair in a combined ATFL and CFL injury: A cadaver study","authors":"Masato Takao ,&nbsp;Satoru Ozeki ,&nbsp;Maya Kubo ,&nbsp;Xavier M. Oliva ,&nbsp;Takayuki Yamazaki ,&nbsp;Dani Lowe ,&nbsp;Kentaro Matsui ,&nbsp;Mai Katakura ,&nbsp;Yoshitaka Takeuchi ,&nbsp;Mark Glazebrook","doi":"10.1016/j.jos.2024.06.002","DOIUrl":"10.1016/j.jos.2024.06.002","url":null,"abstract":"<div><h3>Background</h3><div>Even though 20% of chronic lateral ankle instability results from a combined anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) injury, only the ATFL is sutured using arthroscopic ligament repair<span> techniques. Although some biomechanical and clinical studies have proved that isolated ATFL repair yields excellent results, previous biomechanical studies were performed using systems that only allow indirect estimations. The purpose of this study was to clarify strain patterns by directly measuring repaired ATFL and CFL strain patterns on cadaveric models that underwent isolated ATFL repair of a combined ATFL and CFL injury.</span></div></div><div><h3>Methods</h3><div><span>The miniaturization ligament performance probe (MLPP) system was used for directly measuring the strain patterns to insert the strain gauges into the mid-substance of normal and repaired ATFL and CFL fibers in five </span>cadaveric specimens to allow measurement of strain patterns in the axial and three-dimensional motion of the ankle.</div></div><div><h3>Results</h3><div>The normal and repaired ATFL showed similar strain patterns in axial and three-dimensional motions. During the axial range of motion of the ankle, the repaired CFL showed a strain pattern almost similar to that of normal CFL, but the strain increased as the plantar flexion or dorsiflexion<span> angle increased to the maximum value of 100 at 30° plantarflexion or strain values of 17–55/100 at 15°dorsiflexion. During three-dimensional motion, the repaired CFL was under the maximum value of 100 during dorsiflexion-inversion and exhibited less strain (7–38/100) during plantar flexion-eversion.</span></div></div><div><h3>Conclusion</h3><div>The repaired CFL did not show a strain pattern that was completely consistent with a normal strain pattern; however, it did have some degree of tension similar to a normal strain pattern, even though it was not directly repaired.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 364-371"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141419555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A patient and public involvement study to explore patient perspectives on the efficacy of treatments for pain and numbness derived from ossification of posterior longitudinal ligament of the spine","authors":"Masahiko Takahata ,&nbsp;Yasuko Masuda ,&nbsp;Tsutomu Endo ,&nbsp;Yoshinao Koike ,&nbsp;Masashi Yamazaki ,&nbsp;Hiroshi Taneichi ,&nbsp;Masayuki Miyagi ,&nbsp;Hiroshi Takahashi ,&nbsp;Norimasa Iwasaki","doi":"10.1016/j.jos.2024.05.004","DOIUrl":"10.1016/j.jos.2024.05.004","url":null,"abstract":"<div><h3>Background</h3><div>Chronic pain and numbness are common complaints in patients with ossification of the posterior longitudinal ligament of the spine (OPLL). However, it is unclear whether the current treatments are effective in patients with OPLL in terms of improving pain and numbness.</div></div><div><h3>Methods</h3><div><span><span>A cross-sectional survey of patients with OPLL was conducted to determine patient satisfaction with surgery and drug therapy for pain and numbness, and its association with health-related </span>quality of life. The survey was conducted by a patient association and its members, and anonymized data were analyzed by physicians. Comparisons between groups were made using T-tests or Kruskal–Wallis and Steel–Dwass tests, chi-square tests, and </span>Fisher's exact tests.</div></div><div><h3>Results</h3><div><span>Data from 121 patients with OPLL (age 69 ± 11 years, 69 males; 43 females; and 7 unknown) who completed a mailed questionnaire were analyzed. Of the 93 patients with a history of surgery for OPLL, 24% and 18% reported much improvement in pain and numbness, respectively. After surgery, 42% and 48% reported some improvement, and 34% and 34% reported no improvement, respectively. Patients whose numbness did not improve with surgery had a significantly poorer health-related quality of life than those who did. Of the 78 patients who received medication, only 2% reported “much improvement,” 64% reported “some improvement,” and 31% reported “no improvement at all.” Compared to patients with OPLL only in the </span>cervical spine, those with diffuse-type OPLL showed poorer improvement in numbness after surgery and poorer quality of life.</div></div><div><h3>Conclusions</h3><div>The majority of patients with OPLL belonging to the association were unsatisfied with surgery and pharmacotherapy in terms of pain and numbness improvement, indicating that there is an unmet medical need for more effective treatment for chronic pain and numbness in patients with OPLL.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 278-286"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141175996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Japanese Orthopaedic Association (JOA) clinical practice guidelines on the management of Osteoarthritis of the knee – Secondary publication","authors":"Yuji Uchio ,&nbsp;Muneaki Ishijima ,&nbsp;Masahiko Ikeuchi ,&nbsp;Shiro Ikegawa ,&nbsp;Yasuyuki Ishibashi ,&nbsp;Go Omori ,&nbsp;Naoto Shiba ,&nbsp;Ryohei Takeuchi ,&nbsp;Sakae Tanaka ,&nbsp;Hiroshi Tsumura ,&nbsp;Masataka Deie ,&nbsp;Harukazu Tohyama ,&nbsp;Noriko Yoshimura ,&nbsp;Yasuharu Nakashima","doi":"10.1016/j.jos.2024.06.013","DOIUrl":"10.1016/j.jos.2024.06.013","url":null,"abstract":"","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 185-257"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141913054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Far cortical locking constructs for fixation of distal femur fractures in an Asian population: A prospective observational study","authors":"Eic Ju Lim ,&nbsp;Jae-Woo Cho ,&nbsp;Oog-Jin Shon ,&nbsp;Jong-Keon Oh ,&nbsp;Kyu Tae Hwang ,&nbsp;Gwang Chul Lee","doi":"10.1016/j.jos.2024.03.007","DOIUrl":"10.1016/j.jos.2024.03.007","url":null,"abstract":"<div><h3>Background</h3><div>The stiffness of locked plates suppresses healing process, prompting the introduction of far cortical locking to address this issue. This study aimed to demonstrate the clinical efficacy of far cortical locking constructs in treating distal femoral fractures in an Asian population.</div></div><div><h3>Methods</h3><div>This multicenter prospective observational study was conducted at four university hospitals between February 2018 and February 2021. Demographic data, the presence of metaphyseal comminution, and surgical fixation details were recorded. Clinical outcomes, including single-leg standing, EQ-5D, and EQ-VAS scores, and radiologic outcomes, including the RUST score of each cortex, were evaluated and compared according to the presence of metaphyseal comminution.</div></div><div><h3>Results</h3><div>There were 37 patients (14 men and 23 women) with a mean age of 67.3 ± 11.8 years. Twenty-two patients had metaphyseal comminution (59%), and 15 presented simple fractures in metaphyseal areas. Four patients (13%) could stand on one leg &gt;10s at 6 weeks, and 24 patients (92%) at 1 year. EQ-5D increased from 0.022 ± 0.388 to 0.692 ± 0.347, and the mean EQ-VAS 51.1 ± 13.1 to 74.1 ± 24.1 between discharge (n = 37) and post-operative 1 year (n = 33), respectively. RUST score presented increment for time, from 6.2 ± 1.8 at 6 week to 11.6 ± 1.1 at 1 year. Radiological healing demonstrated rapid increase from week 6 (16/28, 43%) to month 3 (27/31, 87%), with no obvious increase was observed in 6 months (23/26, 89%) or 12 months (25/28, 89%). Simple metaphyseal fractures presented significantly higher RUST scores at 6 weeks and 3 months, but there was no difference in RUST scores at 6 months or 1 year according to metaphyseal comminution.</div></div><div><h3>Conclusions</h3><div>Plate constructs with far cortical locking screws provided safe and effective fixation for distal femoral fractures, with consistent radiological and clinical results, regardless of metaphyseal comminution.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 372-378"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140782285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mo-fi-disc scoring system: Towards understanding the radiological tools to better delineate the disease process and enhancing our solutions for low back pain in artificial intelligence era","authors":"Murat Şakir Ekşi̇ ,&nbsp;Gürkan Berikol ,&nbsp;Emel Ece Özcan-Ekşi̇","doi":"10.1016/j.jos.2024.03.012","DOIUrl":"10.1016/j.jos.2024.03.012","url":null,"abstract":"<div><h3>Background</h3><div><span>‘Mo-fi-disc’ is a new scoring system that quantifies degeneration of the </span>lumbar spine and predicts the intensity of low back pain (LBP). However, its association with LBP-related disability is unknown. In the present study, we aimed to analyze whether ‘Mo-fi-disc’ scoring system could predict LBP-related disability and distinguish patients with LBP from asymptomatic subjects, while the spine medicine marching towards the era of artificial intelligence (AI).</div></div><div><h3>Methods</h3><div><span>This is a cross-sectional analysis of a prospectively collected database. We included age-, gender-, and BMI-matched 132 subjects (patients: 66, asymptomatic subjects: 66). Modic changes (Mo), fatty infiltration in the paraspinal muscles<span> (fi), and intervertebral disc degeneration (disc) were evaluated using ‘Mo-fi-disc’ scoring system on lumbar spine </span></span>magnetic resonance imaging<span><span>. Pain and disability were evaluated with visual analogue scale (VAS) and </span>Oswestry disability index (ODI), respectively.</span></div></div><div><h3>Results</h3><div>A Mo-fi-disc score of 5.5 was the most appropriate cut-off value. Mo-fi-disc scoring system had an OR of 1.79 in distinguishing patients with LBP from asymptomatic subjects. One point increment in VAS and ODI had ORs of 1.82 and 1.13 for predicting higher Mo-fi-disc scores.</div></div><div><h3>Conclusion</h3><div>‘Mo-fi-disc’ scoring system is a useful tool depicting intensity of LBP and LBP-related disability. The cut off value of Mo-fi-disc score is 5.5 to distinguish patients with LBP from asymptomatic subjects. This scoring system, with progressive improvement of its faults, could help clinicians to select appropriate patients for conservative and surgical management in the very near future, in AI-based spine medicine.</div></div><div><h3>IRB approval no</h3><div>ATADEK 2019-12/4.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 267-272"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140786465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of accelerometry to detect varus thrust of osteoarthritic knees before and one year after high tibial osteotomy","authors":"Makoto Wada ,&nbsp;Yusuke Yamamoto ,&nbsp;Takayuki Hirai ,&nbsp;Arisa Kubota ,&nbsp;Naoto Takeura ,&nbsp;Takahiro Adachi","doi":"10.1016/j.jos.2024.05.001","DOIUrl":"10.1016/j.jos.2024.05.001","url":null,"abstract":"<div><h3>Background</h3><div>The purpose of this study was to determine the effects of high tibial osteotomy<span> (HTO) on varus thrust during gait in patients with medial compartment knee osteoarthritis (KOA), and to identify factors that influence thrust before and one year after surgery.</span></div></div><div><h3>Methods</h3><div>HTO was performed in 60 KOA patients (70 knees, including 56 knees by open wedge and 14 by closed wedge). The control group comprised 28 normal, control subjects. Several parameters were evaluated before surgery and one year thereafter. Varus thrust was defined as acceleration of the thigh relative to the lower leg in the coronal plane. Knee-injury-and-osteoarthritis-outcome scores (KOOSs), knee joint angles, radiography, and mediolateral knee acceleration during free speed gait were measured and analyzed.</div></div><div><h3>Results</h3><div>One-year after HTO, KOOSs, knee extension angles, and range of knee motion were improved (p &lt; 0.001). The hip-knee-ankle angle and joint-line-convergent angle (JLCA) had decreased (p &lt; 0.001), and walking speed had increased (p &lt; 0.001). Preoperatively, patient acceleration was significantly (p &lt; 0.05) higher than that of controls, and it did not change after HTO. However, it was reduced significantly (p &lt; 0.05) after adjusting for walking speed. Walking speed correlated significantly with acceleration preoperatively, postoperatively, and among controls. Surgical methods (open-wedge/closed-wedge HTO) and correction angle did not affect postoperative acceleration. There was a low correlation between acceleration and KOOSs (KOOSa, KOOSp), knee joint angles, or JLCA postoperatively, but no relationship was found between acceleration and these parameters in the preoperative or the control group.</div></div><div><h3>Conclusions</h3><div>Walking speed correlated significantly with acceleration preoperatively, postoperatively, and with those of controls. Mediolateral acceleration of the thigh relative to the lower leg in patients with KOA was significantly higher than that of normal controls before surgery, and it did not change after HTO. However, after surgery it was reduced significantly after adjusting for walking speed.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 339-345"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140958054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Four stem fractures in a 12-year follow-up study of 9,135 patients with Exeter hip stems at seven teaching facilities in Japan","authors":"Kan Sasaki ,&nbsp;Hiroshi Fujita ,&nbsp;Toshiki Iwase ,&nbsp;Tatsuro Sakurai ,&nbsp;Hisanori Oura ,&nbsp;Takkan Morishima ,&nbsp;Fumiaki Nishisaka ,&nbsp;Nao Shibanuma ,&nbsp;Naoyuki Katayama ,&nbsp;Masaji Ishii ,&nbsp;Hiromi Otsuka","doi":"10.1016/j.jos.2024.05.005","DOIUrl":"10.1016/j.jos.2024.05.005","url":null,"abstract":"<div><h3>Background</h3><div>Although excellent long-term results have been reported for the Exeter stem, stem fracture is recognized as a rare complication. However, there have been no reports on the incidence and risk factors for stem fractures based on detailed population information. This study aimed to clarify the incidence of Exeter hip stem fracture based on detailed population information from seven Exeter stem teaching centers in Japan and to examine the risk factors for stem fracture.</div></div><div><h3>Methods</h3><div>A total of 8,499 primary total hip arthroplasties (THA) and 636 revision hip arthroplasties (revisions) performed at seven Exeter teaching hospitals between 1999 and 2021 were included and retrospectively investigated based on medical records.</div></div><div><h3>Results</h3><div>Stem fractures were identified in two primary THA (fracture rate: 0.02%) and two revision THA (fracture rate: 0.21%) cases. The stem length was ≤125 mm in three out of these four cases. Revision and 30 stem were the risk factors for stem fractures. Weight and body mass index (BMI) were not significantly associated with the occurrence of stem fractures.</div></div><div><h3>Conclusions</h3><div>In Western countries, the incidence of Exeter stem fractures is reportedly 0.017−0.15% for primary THA and 0.99−1.21% for revision THA. In this study, the incidence of primary THA was 0.02%, which is similar to the lowest reported rate, whereas the incidence of revision THA was 0.21%, which is lower than that reported in previous studies. Revision surgery had the same risk factors as those reported in the West—namely, stem length ≤125 mm (except for the 30 stem) and BMI, which were not risk factors in Japanese patients.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 346-351"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141317576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fracture of the patella involving inferior pole is associated with postoperative patella baja - A retrospective multicenter study","authors":"Fuminori Murase ,&nbsp;Yasuhiko Takegami ,&nbsp;Katsuhiro Tokutake ,&nbsp;Hiroki Oyama ,&nbsp;Oki Arakawa ,&nbsp;Tetsuro Takatsu ,&nbsp;Hiroaki Nakashima ,&nbsp;Kenichi Mishima ,&nbsp;Shiro Imagama","doi":"10.1016/j.jos.2024.03.008","DOIUrl":"10.1016/j.jos.2024.03.008","url":null,"abstract":"<div><h3>Background</h3><div><span>The patella fracture involving of inferior pole fractures (IPF) may be associated with patella baja</span><del>,</del> However, the clinical impact of this condition remains unclear. This study aims to clarify 1) the incidence of patella baja following patellar fracture surgery, 2) the associated clinical outcomes with and without the presence of patella baja, and 3) the potential correlation between the detection of IPF on CT and the occurrence of patella baja.</div></div><div><h3>Methods</h3><div>We conducted a retrospective multicenter study involving 251 patients who underwent surgical treatment for patellar fractures. Patients were divided into the patella baja (PB; n = 49) group and patella norma (PN; n = 202) group. Data collected included demographics, radiographic findings, surgical details, and postoperative complications. We compared these items between PB group and PN group. Logistic regression analyses were used to identify risk factors for patella baja.</div></div><div><h3>Results</h3><div>Immediately following surgery, 36 (14.3%) patients presented with patella baja which increased to 49 cases (19.5%) at six months postoperatively. There is no statistically significant difference in the demographics, surgical details, clinical outcomes and complication between PB group and PN group. While, in the radiographical assessment, the prevalence of IPF on CT scan in the patella baja group was significantly higher than that in the patella norma group. By logistic regression analysis, IPFP on CT was identified as an independent risk factor for patella baja. (odds ratio 2.11, 95% confidence interval: 1.03–4.33, p = 0.042).</div></div><div><h3>Conclusion</h3><div>In patients with patellar fractures, the incidence of patella baja increased from 14.3% immediately post-surgery to 19.5% at the six-month check-up. No significant differences were observed in clinical outcomes between the patella baja group and the norma group. The patella fracture involving IPF on CT emerged as a predictive factor for patella baja.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 379-384"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140336108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic resonance imaging findings in patients with dropped head syndrome","authors":"Tomoyuki Ueshima ,&nbsp;Kenji Endo ,&nbsp;Hirosuke Nishimura ,&nbsp;Yasunobu Sawaji ,&nbsp;Hidekazu Suzuki ,&nbsp;Takato Aihara ,&nbsp;Kazuma Murata ,&nbsp;Takamitsu Konishi ,&nbsp;Takuya Kusakabe ,&nbsp;Hideya Yamauchi ,&nbsp;Jun Matsubayashi ,&nbsp;Kengo Yamamoto","doi":"10.1016/j.jos.2024.04.005","DOIUrl":"10.1016/j.jos.2024.04.005","url":null,"abstract":"<div><h3>Background</h3><div>Dropped head syndrome (DHS) is difficult to diagnose only by clinical examination. Although characteristic images on X-rays of DHS have been studied, changes in soft tissue of the disease have remained largely unknown. Magnetic resonance imaging (MRI) is useful for evaluating soft tissue, and we therefore performed this study with the purpose of investigating the characteristic signal changes of DHS on MRI by a comparison with those of cervical spondylosis.</div></div><div><h3>Methods</h3><div>The study involved 35 patients diagnosed with DHS within 6 months after the onset and 32 patients with cervical spondylosis<span> as control. The signal changes in cervical extensor muscles, interspinous tissue, anterior longitudinal ligament (ALL) and Modic change on MRI were analyzed.</span></div></div><div><h3>Results</h3><div>Signal changes of cervical extensor muscles were 51.4% in DHS and 6.3% in the control group, those of interspinous tissue were 85.7% and 18.8%, and those of ALL were 80.0% and 21.9%, respectively, suggesting that the frequency of signal changes of cervical extensor muscles, interspinous tissue and ALL was significantly higher in the DHS group (p &lt; 0.05). The presence of Modic change of acute phase (Modic type I) was also significantly higher in the DHS group than in the control group (p &lt; 0.001).</div></div><div><h3>Conclusion</h3><div>MRI findings of DHS within 6 months after the onset presented the characteristic signal changes in cervical extensor muscles, interspinous tissue, ALL and Modic change. Evaluation of MRI signal changes is useful for an objective evaluation of DHS.</div></div>","PeriodicalId":16939,"journal":{"name":"Journal of Orthopaedic Science","volume":"30 2","pages":"Pages 273-277"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140864358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}